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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
[linux-2.6-block.git] / drivers / net / cxgb3 / cxgb3_offload.c
CommitLineData
4d22de3e 1/*
1d68e93d 2 * Copyright (c) 2006-2007 Chelsio, Inc. All rights reserved.
4d22de3e
DLR		 3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include <linux/list.h>
34#include <net/neighbour.h>
35#include <linux/notifier.h>
36#include <asm/atomic.h>
37#include <linux/proc_fs.h>
38#include <linux/if_vlan.h>
39#include <net/netevent.h>
40#include <linux/highmem.h>
41#include <linux/vmalloc.h>
42
43#include "common.h"
44#include "regs.h"
45#include "cxgb3_ioctl.h"
46#include "cxgb3_ctl_defs.h"
47#include "cxgb3_defs.h"
48#include "l2t.h"
49#include "firmware_exports.h"
50#include "cxgb3_offload.h"
51
52static LIST_HEAD(client_list);
53static LIST_HEAD(ofld_dev_list);
54static DEFINE_MUTEX(cxgb3_db_lock);
55
56static DEFINE_RWLOCK(adapter_list_lock);
57static LIST_HEAD(adapter_list);
58
59static const unsigned int MAX_ATIDS = 64 * 1024;
c9a6ce50 60static const unsigned int ATID_BASE = 0x10000;
4d22de3e
DLR		 61
62static inline int offload_activated(struct t3cdev *tdev)
63{
64 const struct adapter *adapter = tdev2adap(tdev);
65
66 return (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map));
67}
68
69/**
70 * cxgb3_register_client - register an offload client
71 * @client: the client
72 *
73 * Add the client to the client list,
74 * and call backs the client for each activated offload device
75 */
76void cxgb3_register_client(struct cxgb3_client *client)
77{
78 struct t3cdev *tdev;
79
80 mutex_lock(&cxgb3_db_lock);
81 list_add_tail(&client->client_list, &client_list);
82
83 if (client->add) {
84 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
85 if (offload_activated(tdev))
86 client->add(tdev);
87 }
88 }
89 mutex_unlock(&cxgb3_db_lock);
90}
91
92EXPORT_SYMBOL(cxgb3_register_client);
93
94/**
95 * cxgb3_unregister_client - unregister an offload client
96 * @client: the client
97 *
98 * Remove the client to the client list,
99 * and call backs the client for each activated offload device.
100 */
101void cxgb3_unregister_client(struct cxgb3_client *client)
102{
103 struct t3cdev *tdev;
104
105 mutex_lock(&cxgb3_db_lock);
106 list_del(&client->client_list);
107
108 if (client->remove) {
109 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
110 if (offload_activated(tdev))
111 client->remove(tdev);
112 }
113 }
114 mutex_unlock(&cxgb3_db_lock);
115}
116
117EXPORT_SYMBOL(cxgb3_unregister_client);
118
119/**
120 * cxgb3_add_clients - activate registered clients for an offload device
121 * @tdev: the offload device
122 *
123 * Call backs all registered clients once a offload device is activated
124 */
125void cxgb3_add_clients(struct t3cdev *tdev)
126{
127 struct cxgb3_client *client;
128
129 mutex_lock(&cxgb3_db_lock);
130 list_for_each_entry(client, &client_list, client_list) {
131 if (client->add)
132 client->add(tdev);
133 }
134 mutex_unlock(&cxgb3_db_lock);
135}
136
137/**
138 * cxgb3_remove_clients - deactivates registered clients
139 * for an offload device
140 * @tdev: the offload device
141 *
142 * Call backs all registered clients once a offload device is deactivated
143 */
144void cxgb3_remove_clients(struct t3cdev *tdev)
145{
146 struct cxgb3_client *client;
147
148 mutex_lock(&cxgb3_db_lock);
149 list_for_each_entry(client, &client_list, client_list) {
150 if (client->remove)
151 client->remove(tdev);
152 }
153 mutex_unlock(&cxgb3_db_lock);
154}
155
156static struct net_device *get_iff_from_mac(struct adapter *adapter,
157 const unsigned char *mac,
158 unsigned int vlan)
159{
160 int i;
161
162 for_each_port(adapter, i) {
5c15bdec 163 struct vlan_group *grp;
4d22de3e
DLR		 164 struct net_device *dev = adapter->port[i];
165 const struct port_info *p = netdev_priv(dev);
166
167 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
168 if (vlan && vlan != VLAN_VID_MASK) {
169 grp = p->vlan_grp;
5c15bdec
DA		 170 dev = NULL;
171 if (grp)
172 dev = vlan_group_get_device(grp, vlan);
4d22de3e
DLR		 173 } else
174 while (dev->master)
175 dev = dev->master;
176 return dev;
177 }
178 }
179 return NULL;
180}
181
182static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
183 void *data)
184{
185 int ret = 0;
186 struct ulp_iscsi_info *uiip = data;
187
188 switch (req) {
189 case ULP_ISCSI_GET_PARAMS:
190 uiip->pdev = adapter->pdev;
191 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
192 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
193 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
194 /*
195 * On tx, the iscsi pdu has to be <= tx page size and has to
196 * fit into the Tx PM FIFO.
197 */
198 uiip->max_txsz = min(adapter->params.tp.tx_pg_size,
199 t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
200 /* on rx, the iscsi pdu has to be < rx page size and the
201 whole pdu + cpl headers has to fit into one sge buffer */
202 uiip->max_rxsz = min_t(unsigned int,
203 adapter->params.tp.rx_pg_size,
204 (adapter->sge.qs[0].fl[1].buf_size -
205 sizeof(struct cpl_rx_data) * 2 -
206 sizeof(struct cpl_rx_data_ddp)));
207 break;
208 case ULP_ISCSI_SET_PARAMS:
209 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
210 break;
211 default:
212 ret = -EOPNOTSUPP;
213 }
214 return ret;
215}
216
217/* Response queue used for RDMA events. */
218#define ASYNC_NOTIF_RSPQ 0
219
220static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
221{
222 int ret = 0;
223
224 switch (req) {
9265fabf
SH		 225 case RDMA_GET_PARAMS: {
226 struct rdma_info *rdma = data;
4d22de3e
DLR		 227 struct pci_dev *pdev = adapter->pdev;
228
9265fabf
SH		 229 rdma->udbell_physbase = pci_resource_start(pdev, 2);
230 rdma->udbell_len = pci_resource_len(pdev, 2);
231 rdma->tpt_base =
4d22de3e 232 t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
9265fabf
SH		 233 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
234 rdma->pbl_base =
4d22de3e 235 t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
9265fabf
SH		 236 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
237 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
238 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
239 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
240 rdma->pdev = pdev;
4d22de3e
DLR		 241 break;
242 }
243 case RDMA_CQ_OP:{
244 unsigned long flags;
9265fabf 245 struct rdma_cq_op *rdma = data;
4d22de3e
DLR		 246
247 /* may be called in any context */
248 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
9265fabf
SH		 249 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
250 rdma->credits);
4d22de3e
DLR		 251 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
252 break;
253 }
254 case RDMA_GET_MEM:{
255 struct ch_mem_range *t = data;
256 struct mc7 *mem;
257
258 if ((t->addr & 7) || (t->len & 7))
259 return -EINVAL;
260 if (t->mem_id == MEM_CM)
261 mem = &adapter->cm;
262 else if (t->mem_id == MEM_PMRX)
263 mem = &adapter->pmrx;
264 else if (t->mem_id == MEM_PMTX)
265 mem = &adapter->pmtx;
266 else
267 return -EINVAL;
268
269 ret =
270 t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
271 (u64 *) t->buf);
272 if (ret)
273 return ret;
274 break;
275 }
276 case RDMA_CQ_SETUP:{
9265fabf 277 struct rdma_cq_setup *rdma = data;
4d22de3e
DLR		 278
279 spin_lock_irq(&adapter->sge.reg_lock);
280 ret =
9265fabf
SH		 281 t3_sge_init_cqcntxt(adapter, rdma->id,
282 rdma->base_addr, rdma->size,
4d22de3e 283 ASYNC_NOTIF_RSPQ,
9265fabf
SH		 284 rdma->ovfl_mode, rdma->credits,
285 rdma->credit_thres);
4d22de3e
DLR		 286 spin_unlock_irq(&adapter->sge.reg_lock);
287 break;
288 }
289 case RDMA_CQ_DISABLE:
290 spin_lock_irq(&adapter->sge.reg_lock);
291 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
292 spin_unlock_irq(&adapter->sge.reg_lock);
293 break;
294 case RDMA_CTRL_QP_SETUP:{
9265fabf 295 struct rdma_ctrlqp_setup *rdma = data;
4d22de3e
DLR		 296
297 spin_lock_irq(&adapter->sge.reg_lock);
298 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
299 SGE_CNTXT_RDMA,
300 ASYNC_NOTIF_RSPQ,
9265fabf 301 rdma->base_addr, rdma->size,
4d22de3e
DLR		 302 FW_RI_TID_START, 1, 0);
303 spin_unlock_irq(&adapter->sge.reg_lock);
304 break;
305 }
14cc180f
SW		 306 case RDMA_GET_MIB: {
307 spin_lock(&adapter->stats_lock);
308 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
309 spin_unlock(&adapter->stats_lock);
310 break;
311 }
4d22de3e
DLR		 312 default:
313 ret = -EOPNOTSUPP;
314 }
315 return ret;
316}
317
318static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
319{
320 struct adapter *adapter = tdev2adap(tdev);
321 struct tid_range *tid;
322 struct mtutab *mtup;
323 struct iff_mac *iffmacp;
324 struct ddp_params *ddpp;
325 struct adap_ports *ports;
e22bb45d
DLR		 326 struct ofld_page_info *rx_page_info;
327 struct tp_params *tp = &adapter->params.tp;
4d22de3e
DLR		 328 int i;
329
330 switch (req) {
331 case GET_MAX_OUTSTANDING_WR:
332 *(unsigned int *)data = FW_WR_NUM;
333 break;
334 case GET_WR_LEN:
335 *(unsigned int *)data = WR_FLITS;
336 break;
337 case GET_TX_MAX_CHUNK:
338 *(unsigned int *)data = 1 << 20; /* 1MB */
339 break;
340 case GET_TID_RANGE:
341 tid = data;
342 tid->num = t3_mc5_size(&adapter->mc5) -
343 adapter->params.mc5.nroutes -
344 adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
345 tid->base = 0;
346 break;
347 case GET_STID_RANGE:
348 tid = data;
349 tid->num = adapter->params.mc5.nservers;
350 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
351 adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
352 break;
353 case GET_L2T_CAPACITY:
354 *(unsigned int *)data = 2048;
355 break;
356 case GET_MTUS:
357 mtup = data;
358 mtup->size = NMTUS;
359 mtup->mtus = adapter->params.mtus;
360 break;
361 case GET_IFF_FROM_MAC:
362 iffmacp = data;
363 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
364 iffmacp->vlan_tag &
365 VLAN_VID_MASK);
366 break;
367 case GET_DDP_PARAMS:
368 ddpp = data;
369 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
370 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
371 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
372 break;
373 case GET_PORTS:
374 ports = data;
375 ports->nports = adapter->params.nports;
376 for_each_port(adapter, i)
377 ports->lldevs[i] = adapter->port[i];
378 break;
379 case ULP_ISCSI_GET_PARAMS:
380 case ULP_ISCSI_SET_PARAMS:
381 if (!offload_running(adapter))
382 return -EAGAIN;
383 return cxgb_ulp_iscsi_ctl(adapter, req, data);
384 case RDMA_GET_PARAMS:
385 case RDMA_CQ_OP:
386 case RDMA_CQ_SETUP:
387 case RDMA_CQ_DISABLE:
388 case RDMA_CTRL_QP_SETUP:
389 case RDMA_GET_MEM:
14cc180f 390 case RDMA_GET_MIB:
4d22de3e
DLR		 391 if (!offload_running(adapter))
392 return -EAGAIN;
393 return cxgb_rdma_ctl(adapter, req, data);
e22bb45d
DLR		 394 case GET_RX_PAGE_INFO:
395 rx_page_info = data;
396 rx_page_info->page_size = tp->rx_pg_size;
397 rx_page_info->num = tp->rx_num_pgs;
398 break;
4d22de3e
DLR		 399 default:
400 return -EOPNOTSUPP;
401 }
402 return 0;
403}
404
405/*
406 * Dummy handler for Rx offload packets in case we get an offload packet before
407 * proper processing is setup. This complains and drops the packet as it isn't
408 * normal to get offload packets at this stage.
409 */
410static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
411 int n)
412{
4d22de3e
DLR		 413 while (n--)
414 dev_kfree_skb_any(skbs[n]);
415 return 0;
416}
417
418static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
419{
420}
421
422void cxgb3_set_dummy_ops(struct t3cdev *dev)
423{
424 dev->recv = rx_offload_blackhole;
425 dev->neigh_update = dummy_neigh_update;
426}
427
428/*
429 * Free an active-open TID.
430 */
431void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
432{
433 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
434 union active_open_entry *p = atid2entry(t, atid);
435 void *ctx = p->t3c_tid.ctx;
436
437 spin_lock_bh(&t->atid_lock);
438 p->next = t->afree;
439 t->afree = p;
440 t->atids_in_use--;
441 spin_unlock_bh(&t->atid_lock);
442
443 return ctx;
444}
445
446EXPORT_SYMBOL(cxgb3_free_atid);
447
448/*
449 * Free a server TID and return it to the free pool.
450 */
451void cxgb3_free_stid(struct t3cdev *tdev, int stid)
452{
453 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
454 union listen_entry *p = stid2entry(t, stid);
455
456 spin_lock_bh(&t->stid_lock);
457 p->next = t->sfree;
458 t->sfree = p;
459 t->stids_in_use--;
460 spin_unlock_bh(&t->stid_lock);
461}
462
463EXPORT_SYMBOL(cxgb3_free_stid);
464
465void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
466 void *ctx, unsigned int tid)
467{
468 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
469
470 t->tid_tab[tid].client = client;
471 t->tid_tab[tid].ctx = ctx;
472 atomic_inc(&t->tids_in_use);
473}
474
475EXPORT_SYMBOL(cxgb3_insert_tid);
476
477/*
478 * Populate a TID_RELEASE WR. The skb must be already propely sized.
479 */
480static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
481{
482 struct cpl_tid_release *req;
483
484 skb->priority = CPL_PRIORITY_SETUP;
485 req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
486 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
487 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
488}
489
490static void t3_process_tid_release_list(struct work_struct *work)
491{
492 struct t3c_data *td = container_of(work, struct t3c_data,
493 tid_release_task);
494 struct sk_buff *skb;
495 struct t3cdev *tdev = td->dev;
2eab17ab 496
4d22de3e
DLR		 497
498 spin_lock_bh(&td->tid_release_lock);
499 while (td->tid_release_list) {
500 struct t3c_tid_entry *p = td->tid_release_list;
501
502 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
503 spin_unlock_bh(&td->tid_release_lock);
504
505 skb = alloc_skb(sizeof(struct cpl_tid_release),
506 GFP_KERNEL | __GFP_NOFAIL);
507 mk_tid_release(skb, p - td->tid_maps.tid_tab);
508 cxgb3_ofld_send(tdev, skb);
509 p->ctx = NULL;
510 spin_lock_bh(&td->tid_release_lock);
511 }
512 spin_unlock_bh(&td->tid_release_lock);
513}
514
515/* use ctx as a next pointer in the tid release list */
516void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
517{
518 struct t3c_data *td = T3C_DATA(tdev);
519 struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
520
521 spin_lock_bh(&td->tid_release_lock);
522 p->ctx = (void *)td->tid_release_list;
606fcd0b 523 p->client = NULL;
4d22de3e
DLR		 524 td->tid_release_list = p;
525 if (!p->ctx)
526 schedule_work(&td->tid_release_task);
527 spin_unlock_bh(&td->tid_release_lock);
528}
529
530EXPORT_SYMBOL(cxgb3_queue_tid_release);
531
532/*
533 * Remove a tid from the TID table. A client may defer processing its last
534 * CPL message if it is locked at the time it arrives, and while the message
535 * sits in the client's backlog the TID may be reused for another connection.
536 * To handle this we atomically switch the TID association if it still points
537 * to the original client context.
538 */
539void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
540{
541 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
542
543 BUG_ON(tid >= t->ntids);
544 if (tdev->type == T3A)
545 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
546 else {
547 struct sk_buff *skb;
548
549 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
550 if (likely(skb)) {
551 mk_tid_release(skb, tid);
552 cxgb3_ofld_send(tdev, skb);
553 t->tid_tab[tid].ctx = NULL;
554 } else
555 cxgb3_queue_tid_release(tdev, tid);
556 }
557 atomic_dec(&t->tids_in_use);
558}
559
560EXPORT_SYMBOL(cxgb3_remove_tid);
561
562int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
563 void *ctx)
564{
565 int atid = -1;
566 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
567
568 spin_lock_bh(&t->atid_lock);
9f238486
DLR		 569 if (t->afree &&
570 t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
571 t->ntids) {
4d22de3e
DLR		 572 union active_open_entry *p = t->afree;
573
574 atid = (p - t->atid_tab) + t->atid_base;
575 t->afree = p->next;
576 p->t3c_tid.ctx = ctx;
577 p->t3c_tid.client = client;
578 t->atids_in_use++;
579 }
580 spin_unlock_bh(&t->atid_lock);
581 return atid;
582}
583
584EXPORT_SYMBOL(cxgb3_alloc_atid);
585
586int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
587 void *ctx)
588{
589 int stid = -1;
590 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
591
592 spin_lock_bh(&t->stid_lock);
593 if (t->sfree) {
594 union listen_entry *p = t->sfree;
595
596 stid = (p - t->stid_tab) + t->stid_base;
597 t->sfree = p->next;
598 p->t3c_tid.ctx = ctx;
599 p->t3c_tid.client = client;
600 t->stids_in_use++;
601 }
602 spin_unlock_bh(&t->stid_lock);
603 return stid;
604}
605
606EXPORT_SYMBOL(cxgb3_alloc_stid);
607
5fbf816f
DLR		 608/* Get the t3cdev associated with a net_device */
609struct t3cdev *dev2t3cdev(struct net_device *dev)
610{
611 const struct port_info *pi = netdev_priv(dev);
612
613 return (struct t3cdev *)pi->adapter;
614}
615
616EXPORT_SYMBOL(dev2t3cdev);
617
4d22de3e
DLR		 618static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
619{
620 struct cpl_smt_write_rpl *rpl = cplhdr(skb);
621
622 if (rpl->status != CPL_ERR_NONE)
623 printk(KERN_ERR
624 "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
625 rpl->status, GET_TID(rpl));
626
627 return CPL_RET_BUF_DONE;
628}
629
630static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
631{
632 struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
633
634 if (rpl->status != CPL_ERR_NONE)
635 printk(KERN_ERR
636 "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
637 rpl->status, GET_TID(rpl));
638
639 return CPL_RET_BUF_DONE;
640}
641
b881955b
DLR		 642static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
643{
644 struct cpl_rte_write_rpl *rpl = cplhdr(skb);
645
646 if (rpl->status != CPL_ERR_NONE)
647 printk(KERN_ERR
648 "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
649 rpl->status, GET_TID(rpl));
650
651 return CPL_RET_BUF_DONE;
652}
653
4d22de3e
DLR		 654static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
655{
656 struct cpl_act_open_rpl *rpl = cplhdr(skb);
657 unsigned int atid = G_TID(ntohl(rpl->atid));
658 struct t3c_tid_entry *t3c_tid;
659
660 t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
606fcd0b
DLR		 661 if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
662 t3c_tid->client->handlers &&
4d22de3e
DLR		 663 t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
664 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
665 t3c_tid->
666 ctx);
667 } else {
668 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
669 dev->name, CPL_ACT_OPEN_RPL);
670 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
671 }
672}
673
674static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
675{
676 union opcode_tid *p = cplhdr(skb);
677 unsigned int stid = G_TID(ntohl(p->opcode_tid));
678 struct t3c_tid_entry *t3c_tid;
679
680 t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
606fcd0b 681 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 682 t3c_tid->client->handlers[p->opcode]) {
683 return t3c_tid->client->handlers[p->opcode] (dev, skb,
684 t3c_tid->ctx);
685 } else {
686 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
687 dev->name, p->opcode);
688 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
689 }
690}
691
692static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
693{
694 union opcode_tid *p = cplhdr(skb);
695 unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
696 struct t3c_tid_entry *t3c_tid;
697
698 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
606fcd0b 699 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 700 t3c_tid->client->handlers[p->opcode]) {
701 return t3c_tid->client->handlers[p->opcode]
702 (dev, skb, t3c_tid->ctx);
703 } else {
704 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
705 dev->name, p->opcode);
706 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
707 }
708}
709
710static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
711{
712 struct cpl_pass_accept_req *req = cplhdr(skb);
713 unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
c9a6ce50 714 struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
4d22de3e 715 struct t3c_tid_entry *t3c_tid;
c9a6ce50 716 unsigned int tid = GET_TID(req);
4d22de3e 717
c9a6ce50
DLR		 718 if (unlikely(tid >= t->ntids)) {
719 printk("%s: passive open TID %u too large\n",
720 dev->name, tid);
721 t3_fatal_err(tdev2adap(dev));
722 return CPL_RET_BUF_DONE;
723 }
724
725 t3c_tid = lookup_stid(t, stid);
726 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 727 t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
728 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
729 (dev, skb, t3c_tid->ctx);
730 } else {
731 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
732 dev->name, CPL_PASS_ACCEPT_REQ);
733 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
734 }
735}
736
606fcd0b
DLR		 737/*
738 * Returns an sk_buff for a reply CPL message of size len. If the input
739 * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
740 * is allocated. The input skb must be of size at least len. Note that this
741 * operation does not destroy the original skb data even if it decides to reuse
742 * the buffer.
743 */
744static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
1f41bb3a 745 gfp_t gfp)
606fcd0b
DLR		 746{
747 if (likely(!skb_cloned(skb))) {
748 BUG_ON(skb->len < len);
749 __skb_trim(skb, len);
750 skb_get(skb);
751 } else {
752 skb = alloc_skb(len, gfp);
753 if (skb)
754 __skb_put(skb, len);
755 }
756 return skb;
757}
758
4d22de3e
DLR		 759static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
760{
761 union opcode_tid *p = cplhdr(skb);
762 unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
763 struct t3c_tid_entry *t3c_tid;
764
765 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
606fcd0b 766 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 767 t3c_tid->client->handlers[p->opcode]) {
768 return t3c_tid->client->handlers[p->opcode]
769 (dev, skb, t3c_tid->ctx);
770 } else {
771 struct cpl_abort_req_rss *req = cplhdr(skb);
772 struct cpl_abort_rpl *rpl;
606fcd0b
DLR		 773 struct sk_buff *reply_skb;
774 unsigned int tid = GET_TID(req);
775 u8 cmd = req->status;
776
777 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
778 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
779 goto out;
4d22de3e 780
606fcd0b
DLR		 781 reply_skb = cxgb3_get_cpl_reply_skb(skb,
782 sizeof(struct
783 cpl_abort_rpl),
784 GFP_ATOMIC);
785
786 if (!reply_skb) {
4d22de3e
DLR		 787 printk("do_abort_req_rss: couldn't get skb!\n");
788 goto out;
789 }
606fcd0b
DLR		 790 reply_skb->priority = CPL_PRIORITY_DATA;
791 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
792 rpl = cplhdr(reply_skb);
4d22de3e
DLR		 793 rpl->wr.wr_hi =
794 htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
606fcd0b
DLR		 795 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
796 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
797 rpl->cmd = cmd;
798 cxgb3_ofld_send(dev, reply_skb);
4d22de3e
DLR		 799out:
800 return CPL_RET_BUF_DONE;
801 }
802}
803
804static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
805{
806 struct cpl_act_establish *req = cplhdr(skb);
807 unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
c9a6ce50 808 struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
4d22de3e 809 struct t3c_tid_entry *t3c_tid;
c9a6ce50 810 unsigned int tid = GET_TID(req);
4d22de3e 811
c9a6ce50
DLR		 812 if (unlikely(tid >= t->ntids)) {
813 printk("%s: active establish TID %u too large\n",
814 dev->name, tid);
815 t3_fatal_err(tdev2adap(dev));
816 return CPL_RET_BUF_DONE;
817 }
818
819 t3c_tid = lookup_atid(t, atid);
606fcd0b 820 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 821 t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
822 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
823 (dev, skb, t3c_tid->ctx);
824 } else {
825 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
c9a6ce50 826 dev->name, CPL_ACT_ESTABLISH);
4d22de3e
DLR		 827 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
828 }
829}
830
4d22de3e
DLR		 831static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
832{
833 struct cpl_trace_pkt *p = cplhdr(skb);
834
b5344972 835 skb->protocol = htons(0xffff);
4d22de3e
DLR		 836 skb->dev = dev->lldev;
837 skb_pull(skb, sizeof(*p));
459a98ed 838 skb_reset_mac_header(skb);
4d22de3e
DLR		 839 netif_receive_skb(skb);
840 return 0;
841}
842
fa3a6cb4
AV		 843/*
844 * That skb would better have come from process_responses() where we abuse
845 * ->priority and ->csum to carry our data. NB: if we get to per-arch
846 * ->csum, the things might get really interesting here.
847 */
848
849static inline u32 get_hwtid(struct sk_buff *skb)
850{
851 return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
852}
853
854static inline u32 get_opcode(struct sk_buff *skb)
855{
856 return G_OPCODE(ntohl((__force __be32)skb->csum));
857}
858
4d22de3e
DLR		 859static int do_term(struct t3cdev *dev, struct sk_buff *skb)
860{
fa3a6cb4
AV		 861 unsigned int hwtid = get_hwtid(skb);
862 unsigned int opcode = get_opcode(skb);
4d22de3e
DLR		 863 struct t3c_tid_entry *t3c_tid;
864
865 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
606fcd0b 866 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 867 t3c_tid->client->handlers[opcode]) {
868 return t3c_tid->client->handlers[opcode] (dev, skb,
869 t3c_tid->ctx);
870 } else {
871 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
872 dev->name, opcode);
873 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
874 }
875}
876
877static int nb_callback(struct notifier_block *self, unsigned long event,
878 void *ctx)
879{
880 switch (event) {
881 case (NETEVENT_NEIGH_UPDATE):{
882 cxgb_neigh_update((struct neighbour *)ctx);
883 break;
884 }
885 case (NETEVENT_PMTU_UPDATE):
886 break;
887 case (NETEVENT_REDIRECT):{
888 struct netevent_redirect *nr = ctx;
889 cxgb_redirect(nr->old, nr->new);
890 cxgb_neigh_update(nr->new->neighbour);
891 break;
892 }
893 default:
894 break;
895 }
896 return 0;
897}
898
899static struct notifier_block nb = {
900 .notifier_call = nb_callback
901};
902
903/*
904 * Process a received packet with an unknown/unexpected CPL opcode.
905 */
906static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
907{
908 printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
909 *skb->data);
910 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
911}
912
913/*
914 * Handlers for each CPL opcode
915 */
916static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
917
918/*
919 * Add a new handler to the CPL dispatch table. A NULL handler may be supplied
920 * to unregister an existing handler.
921 */
922void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
923{
924 if (opcode < NUM_CPL_CMDS)
925 cpl_handlers[opcode] = h ? h : do_bad_cpl;
926 else
927 printk(KERN_ERR "T3C: handler registration for "
928 "opcode %x failed\n", opcode);
929}
930
931EXPORT_SYMBOL(t3_register_cpl_handler);
932
933/*
934 * T3CDEV's receive method.
935 */
936int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
937{
938 while (n--) {
939 struct sk_buff *skb = *skbs++;
fa3a6cb4 940 unsigned int opcode = get_opcode(skb);
4d22de3e
DLR		 941 int ret = cpl_handlers[opcode] (dev, skb);
942
943#if VALIDATE_TID
944 if (ret & CPL_RET_UNKNOWN_TID) {
945 union opcode_tid *p = cplhdr(skb);
946
947 printk(KERN_ERR "%s: CPL message (opcode %u) had "
948 "unknown TID %u\n", dev->name, opcode,
949 G_TID(ntohl(p->opcode_tid)));
950 }
951#endif
952 if (ret & CPL_RET_BUF_DONE)
953 kfree_skb(skb);
954 }
955 return 0;
956}
957
958/*
959 * Sends an sk_buff to a T3C driver after dealing with any active network taps.
960 */
961int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
962{
963 int r;
964
965 local_bh_disable();
966 r = dev->send(dev, skb);
967 local_bh_enable();
968 return r;
969}
970
971EXPORT_SYMBOL(cxgb3_ofld_send);
972
973static int is_offloading(struct net_device *dev)
974{
975 struct adapter *adapter;
976 int i;
977
978 read_lock_bh(&adapter_list_lock);
979 list_for_each_entry(adapter, &adapter_list, adapter_list) {
980 for_each_port(adapter, i) {
981 if (dev == adapter->port[i]) {
982 read_unlock_bh(&adapter_list_lock);
983 return 1;
984 }
985 }
986 }
987 read_unlock_bh(&adapter_list_lock);
988 return 0;
989}
990
991void cxgb_neigh_update(struct neighbour *neigh)
992{
993 struct net_device *dev = neigh->dev;
994
995 if (dev && (is_offloading(dev))) {
5fbf816f 996 struct t3cdev *tdev = dev2t3cdev(dev);
4d22de3e
DLR		 997
998 BUG_ON(!tdev);
999 t3_l2t_update(tdev, neigh);
1000 }
1001}
1002
1003static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1004{
1005 struct sk_buff *skb;
1006 struct cpl_set_tcb_field *req;
1007
1008 skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1009 if (!skb) {
1010 printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__);
1011 return;
1012 }
1013 skb->priority = CPL_PRIORITY_CONTROL;
1014 req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1015 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1016 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1017 req->reply = 0;
1018 req->cpu_idx = 0;
1019 req->word = htons(W_TCB_L2T_IX);
1020 req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1021 req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1022 tdev->send(tdev, skb);
1023}
1024
1025void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1026{
1027 struct net_device *olddev, *newdev;
1028 struct tid_info *ti;
1029 struct t3cdev *tdev;
1030 u32 tid;
1031 int update_tcb;
1032 struct l2t_entry *e;
1033 struct t3c_tid_entry *te;
1034
1035 olddev = old->neighbour->dev;
1036 newdev = new->neighbour->dev;
1037 if (!is_offloading(olddev))
1038 return;
1039 if (!is_offloading(newdev)) {
f07b2e40 1040 printk(KERN_WARNING "%s: Redirect to non-offload "
4d22de3e
DLR		 1041 "device ignored.\n", __FUNCTION__);
1042 return;
1043 }
5fbf816f 1044 tdev = dev2t3cdev(olddev);
4d22de3e 1045 BUG_ON(!tdev);
5fbf816f 1046 if (tdev != dev2t3cdev(newdev)) {
4d22de3e
DLR		 1047 printk(KERN_WARNING "%s: Redirect to different "
1048 "offload device ignored.\n", __FUNCTION__);
1049 return;
1050 }
1051
1052 /* Add new L2T entry */
1053 e = t3_l2t_get(tdev, new->neighbour, newdev);
1054 if (!e) {
1055 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1056 __FUNCTION__);
1057 return;
1058 }
1059
1060 /* Walk tid table and notify clients of dst change. */
1061 ti = &(T3C_DATA(tdev))->tid_maps;
1062 for (tid = 0; tid < ti->ntids; tid++) {
1063 te = lookup_tid(ti, tid);
1064 BUG_ON(!te);
606fcd0b 1065 if (te && te->ctx && te->client && te->client->redirect) {
4d22de3e
DLR		 1066 update_tcb = te->client->redirect(te->ctx, old, new, e);
1067 if (update_tcb) {
1068 l2t_hold(L2DATA(tdev), e);
1069 set_l2t_ix(tdev, tid, e);
1070 }
1071 }
1072 }
1073 l2t_release(L2DATA(tdev), e);
1074}
1075
1076/*
1077 * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1078 * The allocated memory is cleared.
1079 */
1080void *cxgb_alloc_mem(unsigned long size)
1081{
1082 void *p = kmalloc(size, GFP_KERNEL);
1083
1084 if (!p)
1085 p = vmalloc(size);
1086 if (p)
1087 memset(p, 0, size);
1088 return p;
1089}
1090
1091/*
1092 * Free memory allocated through t3_alloc_mem().
1093 */
1094void cxgb_free_mem(void *addr)
1095{
9e2779fa 1096 if (is_vmalloc_addr(addr))
4d22de3e
DLR		 1097 vfree(addr);
1098 else
1099 kfree(addr);
1100}
1101
1102/*
1103 * Allocate and initialize the TID tables. Returns 0 on success.
1104 */
1105static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1106 unsigned int natids, unsigned int nstids,
1107 unsigned int atid_base, unsigned int stid_base)
1108{
1109 unsigned long size = ntids * sizeof(*t->tid_tab) +
1110 natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1111
1112 t->tid_tab = cxgb_alloc_mem(size);
1113 if (!t->tid_tab)
1114 return -ENOMEM;
1115
1116 t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1117 t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1118 t->ntids = ntids;
1119 t->nstids = nstids;
1120 t->stid_base = stid_base;
1121 t->sfree = NULL;
1122 t->natids = natids;
1123 t->atid_base = atid_base;
1124 t->afree = NULL;
1125 t->stids_in_use = t->atids_in_use = 0;
1126 atomic_set(&t->tids_in_use, 0);
1127 spin_lock_init(&t->stid_lock);
1128 spin_lock_init(&t->atid_lock);
1129
1130 /*
1131 * Setup the free lists for stid_tab and atid_tab.
1132 */
1133 if (nstids) {
1134 while (--nstids)
1135 t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1136 t->sfree = t->stid_tab;
1137 }
1138 if (natids) {
1139 while (--natids)
1140 t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1141 t->afree = t->atid_tab;
1142 }
1143 return 0;
1144}
1145
1146static void free_tid_maps(struct tid_info *t)
1147{
1148 cxgb_free_mem(t->tid_tab);
1149}
1150
1151static inline void add_adapter(struct adapter *adap)
1152{
1153 write_lock_bh(&adapter_list_lock);
1154 list_add_tail(&adap->adapter_list, &adapter_list);
1155 write_unlock_bh(&adapter_list_lock);
1156}
1157
1158static inline void remove_adapter(struct adapter *adap)
1159{
1160 write_lock_bh(&adapter_list_lock);
1161 list_del(&adap->adapter_list);
1162 write_unlock_bh(&adapter_list_lock);
1163}
1164
1165int cxgb3_offload_activate(struct adapter *adapter)
1166{
1167 struct t3cdev *dev = &adapter->tdev;
1168 int natids, err;
1169 struct t3c_data *t;
1170 struct tid_range stid_range, tid_range;
1171 struct mtutab mtutab;
1172 unsigned int l2t_capacity;
1173
1174 t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1175 if (!t)
1176 return -ENOMEM;
1177
1178 err = -EOPNOTSUPP;
1179 if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1180 dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1181 dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1182 dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1183 dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1184 dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1185 goto out_free;
1186
1187 err = -ENOMEM;
1188 L2DATA(dev) = t3_init_l2t(l2t_capacity);
1189 if (!L2DATA(dev))
1190 goto out_free;
1191
1192 natids = min(tid_range.num / 2, MAX_ATIDS);
1193 err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1194 stid_range.num, ATID_BASE, stid_range.base);
1195 if (err)
1196 goto out_free_l2t;
1197
1198 t->mtus = mtutab.mtus;
1199 t->nmtus = mtutab.size;
1200
1201 INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1202 spin_lock_init(&t->tid_release_lock);
1203 INIT_LIST_HEAD(&t->list_node);
1204 t->dev = dev;
1205
1206 T3C_DATA(dev) = t;
1207 dev->recv = process_rx;
1208 dev->neigh_update = t3_l2t_update;
1209
1210 /* Register netevent handler once */
1211 if (list_empty(&adapter_list))
1212 register_netevent_notifier(&nb);
1213
1214 add_adapter(adapter);
1215 return 0;
1216
1217out_free_l2t:
1218 t3_free_l2t(L2DATA(dev));
1219 L2DATA(dev) = NULL;
1220out_free:
1221 kfree(t);
1222 return err;
1223}
1224
1225void cxgb3_offload_deactivate(struct adapter *adapter)
1226{
1227 struct t3cdev *tdev = &adapter->tdev;
1228 struct t3c_data *t = T3C_DATA(tdev);
1229
1230 remove_adapter(adapter);
1231 if (list_empty(&adapter_list))
1232 unregister_netevent_notifier(&nb);
1233
1234 free_tid_maps(&t->tid_maps);
1235 T3C_DATA(tdev) = NULL;
1236 t3_free_l2t(L2DATA(tdev));
1237 L2DATA(tdev) = NULL;
1238 kfree(t);
1239}
1240
1241static inline void register_tdev(struct t3cdev *tdev)
1242{
1243 static int unit;
1244
1245 mutex_lock(&cxgb3_db_lock);
1246 snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1247 list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1248 mutex_unlock(&cxgb3_db_lock);
1249}
1250
1251static inline void unregister_tdev(struct t3cdev *tdev)
1252{
1253 mutex_lock(&cxgb3_db_lock);
1254 list_del(&tdev->ofld_dev_list);
1255 mutex_unlock(&cxgb3_db_lock);
1256}
1257
1258void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1259{
1260 struct t3cdev *tdev = &adapter->tdev;
1261
1262 INIT_LIST_HEAD(&tdev->ofld_dev_list);
1263
1264 cxgb3_set_dummy_ops(tdev);
1265 tdev->send = t3_offload_tx;
1266 tdev->ctl = cxgb_offload_ctl;
1267 tdev->type = adapter->params.rev == 0 ? T3A : T3B;
1268
1269 register_tdev(tdev);
1270}
1271
1272void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1273{
1274 struct t3cdev *tdev = &adapter->tdev;
1275
1276 tdev->recv = NULL;
1277 tdev->neigh_update = NULL;
1278
1279 unregister_tdev(tdev);
1280}
1281
1282void __init cxgb3_offload_init(void)
1283{
1284 int i;
1285
1286 for (i = 0; i < NUM_CPL_CMDS; ++i)
1287 cpl_handlers[i] = do_bad_cpl;
1288
1289 t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1290 t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
b881955b 1291 t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
4d22de3e
DLR		 1292 t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1293 t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1294 t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1295 t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1296 t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1297 t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1298 t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1299 t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1300 t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1301 t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1302 t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1303 t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1304 t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1305 t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1306 t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
6cdbd77e
DLR		 1307 t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1308 t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
4d22de3e
DLR		 1309 t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1310 t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1311 t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1312 t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1313 t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1314 t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1315}
Linux 6.x block layer and io_uring tree(s)